Best Websites for Teaching and Learning

I attended the IRA meeting last month, and they shared this website. 

http://www.ala.org/aasl/guidelinesandstandards/bestlist/bestwebsites

The Best Websites for Teaching and Learning has tools and resources that the American Association of School Librarians promotes.  It supports the AASL' Standards for the 21st-Century Learner.  Although this was directed towards librarians, it is useful for all education professionals.  I hope you find it useful.